package com.itheima.reggie.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private DishService dishService;

    @Autowired
    private RedisTemplate redisTemplate;

@Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    /**
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name){
        //构造分页构造器对象
        /*Page<Dish> pageInfo = new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null,Dish::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo, queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");

        List<Dish> records = pageInfo.getRecords();

        List<DishDto> list = records.stream().map(item -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id

            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);
        return R.success(dishDtoPage);*/

        //构造分页构造器对象
        Page<DishDto> dishDtoPage = new Page<>(page,pageSize);
        DishDto dishDto = new DishDto();

        if(StringUtils.isNotBlank(name)){
            dishDto.setName(name);
        }
        //执行分页查询
        dishService.pageByParams(dishDtoPage, dishDto);
        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);

        //清除所有菜的缓存
      //  Set keys = redisTemplate.keys("dish_*");
       // redisTemplate.delete(keys);

        //清除指定菜品
        String key = "dish_"+ dishDto.getCategoryId()+"_1";
        redisTemplate.delete(key);

        return R.success("修改菜品成功");
    }

  /*  @GetMapping("/list")
    public R<List<Dish>> list(Dish dish) {
        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus, 1);

        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        return R.success(list);


    }*/
  @GetMapping("/list")
  public R<List<DishDto>> list(Dish dish) {
      List<DishDto>dishDtoList=null;
   String key="dish"+dish.getCategoryId()+"_"+dish.getStatus();
      //获取缓存数据
     dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

      //如存在，就返回，不查询数据库

      if (dishDtoList!=null){
          return R.success(dishDtoList);
      }
      //构造查询条件
      LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
      queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
      //添加条件，查询状态为1（起售状态）的菜品
      queryWrapper.eq(Dish::getStatus, 1);


      //添加排序条件
      queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);


      List<Dish> list = dishService.list(queryWrapper);

      dishDtoList=list.stream().map((item)->{
          DishDto dishDto=new DishDto();
          BeanUtils.copyProperties(item,dishDto);
          Long categoryId = item.getCategoryId();
          Category category = categoryService.getById(categoryId);
          if (category!=null){
              String categoryName = category.getName();
              dishDto.setCategoryName(categoryName);
          }
          Long dishid= item.getId();
          LambdaQueryWrapper<DishFlavor>lambdaQueryWrapper=new LambdaQueryWrapper<>();
          lambdaQueryWrapper.eq(DishFlavor::getDishId,dishid);
          List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
          dishDto.setFlavors(dishFlavorList);
          return dishDto;

      }).collect(Collectors.toList());

      //如不存在，就查询数据库
      redisTemplate.opsForValue().set(key,dishDtoList,600000,TimeUnit.DAYS);

      return R.success(dishDtoList);













}
}
